beamer
Currently only subsection highlighted on the outline on the side of the slide. Is it possible to change the template so when in a subsection the respective section stays highlighted.
\documentclass{beamer}
\mode<presentation>{\usetheme{Hannover}}
\begin{document}
\section{1}
\subsection{a}
\begin{frame}
stuff
\end{frame}
\subsection{b}
\begin{frame}
more stuff
\end{frame}
\end{document}
One idea could be use the column and columns environment. For example, look at this MWE:
\documentclass{beamer}
\usetheme{Hannover}
\begin{document}
\begin{frame}
\frametitle{Vision(Image Acquisition \footnotesize contd.. \large)}
\begin{block}{Camera Calibration}
\begin{itemize}
\scriptsize\item All supported features are queried
\scriptsize\item Sliders are created
\end{itemize}
\bigskip
\begin{enumerate}
\scriptsize\item Automatic driver-made adjustments are disabled
\scriptsize\item Values taken from sliders are set
\scriptsize\item Config file is updated
\end{enumerate}
\end{block}
\bigskip
%% Second block indented
\begin{columns}[t]
\begin{column}{0.1\textwidth}
\end{column}
\begin{column}{0.9\textwidth}
\begin{block}{Problems}
\begin{itemize}
\scriptsize\item Flickering
\scriptsize\item JPEG Artefacts
\end{itemize}
\end{block}
\end{column}
\end{columns}
\end{frame}
\end{document}
In this way you decide the lenght of the indentation choosing the lenght of the two columns. It is important that the first one is empty, to shift the block. The graphical result is:
This is so, because \insertsectionnumber is defined as (in the file beamerbasesection.sty)
\def\insertsectionnumber{\@arabic\c@section}
And \appendix doesn't change this;
\newcommand<>\appendix{%
\only#1{\part{\appendixname}
\addtocontents{nav}{\protect\headcommand{\protect\beamer@appendixpages{\the\c@page}}}}}
so the counter will appear using arabic representation.
You can change this, redefining \insertsectionnumber in the proper location:
\setcounter{section}{0}
\renewcommand\insertsectionnumber{\Alph{section}}
Perhaps you want to let \appendix do this change:
\documentclass{beamer}
\makeatletter
\renewcommand<>\appendix{%
\setcounter{section}{0}%
\renewcommand\insertsectionnumber{\Alph{section}}%
\only#1{\part{\appendixname}
\addtocontents{nav}{\protect\headcommand{\protect\beamer@appendixpages{\the\c@page}}}}}
\makeatother
\begin{document}
\section{test1}
\begin{frame}{\insertsectionnumber.~\insertsection}
bal bla
\end{frame}
\appendix
\section{test2}
\begin{frame}{\insertsectionnumber.~\insertsection}
bla bla
\end{frame}
\end{document}
Best Answer
This behaviour is not limited to the theme
Hannover, it concerns all themes using sidebars. To change it, you have to patch the macro\insertverticalnavigation, which is responsible for generating the sidebar navigation:The code in ll. 4-9 changes the default behaviour of
beamerto always highlight the current section (with thebeamerthemesection in sidebarin contrast tosection in sidebar shaded) - normally, the section is only highlighted if no subsections are shown in the sidebar, i.e. if you have\usetheme[hideallsubsections]{Hannover}.The resulting sidebar with highlighted section (cropped):